Square and protractor.



G. HENNIGAR 8: R. TENEYGK.

v SQUARE AND PROTRAOTOR. APPLIOATION FILED Jam-21, 1909.

975,036. v I Patented Nov. 8, 1910.

11 III I! I r I llllllhllllilil M W W 4 c. 114: NORRIS PETERS cu,wAsmNanm, n

GEORGE HENNIGAR AND ROY TENEYCK, OF NORTH LANSING, MICHIGAN.

T ICE.

SQUARE AND P-ROTHACTOR.

Application filed December 21, 1909.

To all whom it may concern:

Be it known that we, GEORGE HENNIGAR and RoY TENEYGK, citizens of theUnited States, residing at North Lansing, in the county of Ingham andState of Michigan, have invented certain new and useful Improvements inSquares and Protractors, of which the following is a specification.

Our invention relates to a device adapted to fulfil the functions of asquare, protractor and bevel.

An object of our invention is to provide a device embodying means forholding two blades at right angles to each other, said blades beingadjustable longitudinally for the purpose of taking and transferringmeasurements.

The final object of our invention is to pro vide a device of the abovecharacter, which will be simple in construction, easy to operate, andcheap to manufacture.

Our invention consists generally in the arrangement and combination ofparts to be hereinafter described.

In the accompanying drawings forming a part of this specification, andin which like numerals are employed to designate like parts throughoutthe same, Figure 1 is a side view of our device, some of the bladesbeing removed. Fig. 2 is a similar view of our device equipped with allthe blades. Fig. 3 is a sectional view taken on the line 33 of Fig. 2.Fig. 4 is a similar view taken on the line 44 of Fig. 1. Fig. 5 is asimilar view taken on the line 55 of Fig. 1.

In the preferred embodiment of our invention as illustrated in thedrawings, 1 designates a head-stock or body portion of the device. Thebody portion comprises an arm 2, at oneend of which and at right anglesthereto is formed a short arm 3. An arm 4 is formed upon' the free endof the arm 3 and is arranged at an angle of 45 de grees to said arm 3.The arms 2, 3 and 4 are provided upon their outer edges with grooves 5which are disposed in different planes and adapted for the reception ofblades to be hereinafter referred to. Each of the arms 2, 3 and 4 isprovided at its longitudinal center with a transverse opening 6 withinwhich is movably mounted a hook member 7, the free end of which isdisposed within the opening 5. The hook member 7 is screw threaded as at8 for the reception of a thumb nut 9, and a coilspring Specification ofLetters iPatent.

Patented Nov. 8, 1910.

Serial No. 534,272.

10 surrounds the screw threaded portion 8 and is compressed between thethumb nut 9 and a shoulder 11.

Blades 12, 13 and 14 respectively are disposed within the openings 5upon the arms 2, 3 and 4, and each of said blades 12, 13 and 14 areprovided with corresponding longitudinally arranged grooves 15, whichreceive the free end of the hook member 7, as illustrated in Fig. 5.Itis to be understood that the blades 12, 13 and 14 are to be insertedwithin their respective openings 5 by a longitudinal movement of thesame.

By reference to Fig. 5 it is obvious that the blade arranged within theopening 5 is frict-ionally engaged by the hook member 7 and thusprevented from accidental displacement. It is to be understood that byunscrewing the nut 9 and accordingly relieving the spring 10 of itscompression, that each of the blades 12, 13 and 14 may be readilyadjusted longitudinally of the corresponding arms 2, 3 and 4respectively. It is to be understood that the blades 12, 13 and 14 maybe graduated with any desired scale of measurement. Ne further provide aring-shaped section 16, which is disposed between the arms 2 and 4 andrigidly connected to the same near their ends by means of theprojections 17 and 18 respectively. The ringshaped section 16 isprovided upon one side thereof with a circular groove or cut-out portion19, for the reception of a. reduced edge 20 of a circular plate 21. Thecircular plate 21 is capable of being rotated within thering-shaped-section 16 and is prevented from leaving the same by meansof a clamping screw 22 and a fiat headed screw 23, the clamping screw 22and the flat headed screw 23 being arranged preferably diametrically ofthe ring-shaped section 16. The clamping screw further serves as a meansfor locking the circular plate 21 in a desired position to thering-shaped section 16. The circular plate 21 is provided upon one sidethereof with arelatively thick section of material 24, which is providedwith a groove 25. It is to be understood that the thick section 24extends laterally beyond the ring shaped section 16, so that a graduatedblade 26 may be inserted within the groove 25, and said blade rests uponthe ring-shaped section 16. The blade 26 is also provided with alongitudinal groove 27, within which the free end of a hook member 28fits. The hook member 28 is mounted to move transversely of the 6 v samesection 24 and is held in frictional engagement with the blade26 bymeans of the coil spring 29. The coil spring 29 is arranged within anopening formed upon the section 24: and is compressed between a shoulder30 and a thumb nut 31 which is screw threaded upon one end of the hookmember 28. The blade 26 is thus held from displacement and may beadjusted longitudinally and clamped in such adjusted position. Thering-shaped section 16 is provided with a pointer or line 32 which isadapted to cotiperate with a scale 33 formed upon the circular plate 21.As before stated, the circular plate 21 may be rotated within thering-shaped section 16 and it is thus obvious that the blade 26 may beoscillated to assume different angles with relation to the blade 12. Thepointer 32 and the scale 33 serving to designate the angle at which theblade 26 is arranged with relation to the blade 12. It is thus seen thatour device may be used as a protractor.

Having fully described our invention, what we claim is 1. A device ofthe character described, comprising arms arranged at right angles toeach other, anv arm arranged at an angle of 45 degrees to one of saidvarms, blades mounted upon said arms and adapted to be movedlongitudinally thereof, means connected to said arms for rotatablysupporting a blade, said blade being adapted to be arranged at differentangles to one of said arms, and means for clamping said last named bladeat a desired angle to the last named arm.

2. A device of the character described, comprising arms arranged atright angles to each other, an arm at an angle of 45 degrees to one ofsaid arms, said armsbein provided with longitudinal grooves, bla esarranged within said grooves and adapted to be adjusted longitudinallyof said arms, means for clamping said blades to said arms, a ring-shapedsection rigidly connected to the free ends of two of said arms, a platerotatably mounted upon said ring-shaped section, a blade longitudinallymovably mounted upon said plate, said ring-shaped section being providedwith a pointer and said plate being provided with a scale forascertaining the angle at which said last named blade is arranged.

In testimony whereof we aifix our signatures in presence of twowitnesses.

GEORGE HENNIGAR. ROY TENEYCK.

Witnesses:

WM. HENNIGAR, T. K. JEFFREYS.

